Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 355/25-21 | 280/20-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.99 (710.9) | 25.41 (645.4) | -2.58 (-65.5) -9.2% |
| Width inches (mm) | 13.98 (355) | 11.02 (280) | -2.95 (-75) -21.1% |
| Circum. inches (mm) | 87.93 (2233.36) | 79.83 (2027.58) | -8.1 (-205.77) -9.2% |
| Sidewall Height inches (mm) | 3.49 (88.75) | 2.2 (56) | -1.29 (-32.75) -36.9% |
| Revolutions per mile (km) | 720.59 (447.76) | 793.72 (493.2) | 73.13 (45.44) 10.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.16 mph (29.22 km/h) |
| 25 mph (40.23 km/h) | 22.7 mph (36.53 km/h) |
| 30 mph (48.28 km/h) | 27.24 mph (43.83 km/h) |
| 35 mph (56.33 km/h) | 31.78 mph (51.14 km/h) |
| 40 mph (64.37 km/h) | 36.31 mph (58.44 km/h) |
| 45 mph (72.42 km/h) | 40.85 mph (65.75 km/h) |
| 50 mph (80.47 km/h) | 45.39 mph (73.05 km/h) |
| 55 mph (88.51 km/h) | 49.93 mph (80.36 km/h) |
| 60 mph (96.56 km/h) | 54.47 mph (87.66 km/h) |
| 65 mph (104.61 km/h) | 59.01 mph (94.97 km/h) |
| 70 mph (112.65 km/h) | 63.55 mph (102.27 km/h) |
| 75 mph (120.7 km/h) | 68.09 mph (109.58 km/h) |
| 80 mph (128.75 km/h) | 72.63 mph (116.89 km/h) |
| 85 mph (136.79 km/h) | 77.17 mph (124.19 km/h) |
| 90 mph (144.84 km/h) | 81.71 mph (131.5 km/h) |
| 95 mph (152.89 km/h) | 86.25 mph (138.8 km/h) |
| 100 mph (160.93 km/h) | 90.79 mph (146.11 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 2346 | 2527 | 2639 | 2759 | 2845 | 2940 | 3051 | 3206 | 3361 | 3533 | 3670 | 3919 | 4194 | 4409 | 4547 | 4624 | 4908 | 5303 | 6163 |
Better Fuel Economy Factory Ratios Increased Power
